Explanation

Electrostatic precipitators use static electricity to remove smoke and dust from industrial gases.

Smoke particles are given an electrical charge as they pass through the device.

Charged particles are attracted to oppositely charged plates and stick to them.

This process ensures that the gases released into the atmosphere are cleaner.

Static electricity is widely used in pollution control and air purification system

Explanation

Badar is an Urdu/Arabic term meaning full moon.

It refers to the complete visible Moon in the sky (Full Moon phase).

Explanation

Solar eclipse glasses have lenses coated with black polymer or silver Mylar to safely block 99.99% of sunlight.

These coatings protect eyes by filtering harmful UV and infrared rays during the eclipse.

Explanation

• Sound travels fastest in diamond,
• With a speed of approximately 12,000 meters per second (m/s).
• Because sound travels fastest in stiff, dense materials

Additional information 
The speeds of sound in different materials:

• Air: 343 m/s
• Water: 1433 m/s
• Wood: 3300-3600 m/s
• Brick: 4176 m/s
• Steel: 6100 m/s
• Diamond: 12000 m/s

Explanation

Bicycles, cranes, and hand drills use a combination of pulleys and gears to transfer and control motion.

These machines rely on mechanical advantage from both systems for efficient performance.

Explanation

The principal axis is a straight line passing through the center of curvature and the pole of a spherical mirror.

It serves as the reference line for measuring distances and analyzing image formation in mirrors.

Explanation

In a periscope, mirrors are placed at 45° angles to reflect light down the tube.

This allows the viewer to see over or around obstacles.

Explanation

The El Niño-Southern Oscillation (ENSO) cycle primarily occurs in the East-central Equatorial Pacific Ocean.

It involves periodic changes in sea surface temperatures and atmospheric pressures, influencing global weather patterns.

Explanation

A CT (Computed Tomography) scan uses X-rays and computer processing to create detailed cross-sectional images of the body.

It helps in diagnosing various conditions by providing more detailed images than regular X-rays.

Explanation

The mantle is the largest layer of the Earth by volume, lying between the crust and the core.

It consists mostly of silicate rocks that are solid but can flow slowly over time due to high temperature and pressure.